Under the assumption \( T_{\rm {cp}} \ge \max _k \tau _k\) , the signal in (REF ) becomes a superposition of cyclically shifted copies of the transmit signal \(s(t)\)  in (REF ) [1]}:
\(y(t) = \sum _{k=0}^{K-1} \alpha _k s([t - \tau _k]_{MT}) e^{j 2 \pi \nu _k t} +w(t) ~,\) 
